Data Hackers is a meetup group run by Data 2.0 (data2x.com) that hosts meetups, hackathons, and workshops for SF bay area data hackers. A lot of our hackathons and meetups are in conjunction with our conferences such as DataWeek 2013 (dataweek.co) and DeveloperWeek 2014 (developerweek.com)

Contact us (the organizers) if you're working on a new data-centric developer tool and you want to partner on a Drinkup around SF! (especially if you want to launch something)